Telephonic apparatus.



No. 786,754. PATENTED APR. 4, 1905.

v A. GRAHAM,

'TELEPHONIG APPARATUS.

\ APPLICATION FILED JAN.11, 1904.

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[Mada/g 71 dimesses No. 786,754. v P-ATENTED APR.4,y1905.

' GRAHAM. TELEPHONIG APPARATUS.

APPLIQATIOA 211.211 AN. 11, 1904.

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TELEPHONIO APPARATUS.

APPLICATION FILED JAN. 11, 1904.

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A. GRAHAM. TELEP-HONIO APPARATUS.

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TELBPHONIG APPARATUS.

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' APPLIGATION FILED JAN.11, 1904,

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TBLEPHONIG APPARATUS.

APPLICATION FILED JAN. 11, 1904.

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APPLICATION FILED JAN.11, 1904.

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WL'Zn 66 ea No; 786,754. PATENTED APR. 4, 1905'.

A. GRAHAM. TELEPHONIC APPARATUS.

APILIOATION 1 JAN. 11, 1904.

. l n'rentor,

A. GRAHAM. TELEPHONIG APPARATUS.

APPLIGATION FILED JAN. 11, 1904.

PATENTEIJ APR. 4 1905.

Patented-April 4, 1905.

PATENT QFFICE.

ALFRED GRAHAM,.OF 'DENM-ARK HILL, ENGLAND.

'lELEPHONIC APPARATUS.

SPECIFICATION formingpart bf Letters Patent No. 786,754, dated. April 4, 1905.

- Application filed January 11, 1904- Serial No. 188,597.

.Toull whom it may concern.-

Be it known that I, ALFRED GRAHAM, a subject of the King of Great Britain and Ireland, residing at Denmark Hill, in the county of London, England, have invented Improveinents in 'lelephonic Apparatus, of which the following is a specification.-

This invention has referencetoaconstruction of water-tight telephonic apparatus that is specially adapted for use in exposed positions, such as on the bridge of a ship, which can.be used without alterationhy persons of d iiferent heights, which can be turnedabout a vertical axis, so that the user can face-in any desired (:il". rection, and by means of which the user can while sending and receiving telephonic messages observe objects at a distancein front of or the pillar about a vertical axis and that by at either side of the apparatus. For this'purpose the telephonic transmitter and receiver are arranged within acasing mounted toturn around a horizontal sound-tube fixed to a holder that is mounted to turn about a vertical pillar or support, the said tube being in communication at an intermediate portion of its length ,with the telephonic receiver and at its ends with two normally depending hearing-tub es, one of which (hereinafter called for distinction the mainf hearing-tube) is fixed to thejcasing and serves as a handle for rotating the same, and the other of which is jointed to the holder, and both of which are provided at their free ends with earpieces, the transmitter being arranged to come opposite a speaking-aperture through the casing. The arrangement is such that'the holder with casing and attached parts can be rotated upon raising the main hearingtube into position for use the casing will be simultaneously rotated about a horizontal axis and the speaking-aperture 1n the casing brought into a convenient position" for speaking onto the diaphragm of the transmitter, the user of the instrument being at the same time free to look over the) periphery or past the ends of the casing at 'bbjects in front or to either side thereof; ,The sound-tube is adapted to'carry the stationary contacts and the rotary casing the movableieontaets of a switch device that is connected to the transmitter and receiver,

' arrangements ot'parts, all as hereinafter more ent position.

phonic receiver removed.

to a bell, to line-wires, and-an electric battery in such. a manner that when the hearing-tubes are released and allowed to hangdownward I the bell will be in circuit and the transmitter] particularly described, and pointed out in the claims. A

2. in longitudi al vertical section, one construction of te ephonlc apparatus according to this invention. F 1g. 3 1s a view of the Figure 1 shhYws in front elevation, and'Fig.

right-hand end of the apparatus, and Fig. 4

a view of a portion of the left-hand end time Fig.' 5 is a vertical section on the line A A ofFig. 2, the position of the telephonic re ceiver being indicated in dotted lines. Fig. 6 is a similar view to Fig.- 5, butshows the rotary casing. and attached parts in a differ- Fig. 7 is a horizontal section on the line B B of Fig. 2, but with the telepillar, showing a modified construction. Figs.

13 and 1% are sectional views on the lineF/ E of Fig. 12, Fig. 13 being a plan or top view and Fig. 14-. an inverted view. Fig. 15 is a front viewwith a portion of the cover removed, showing a supplementary. switch device. Fig. 16 is a similar view to Fig. 15,

showing a modified construction of suppie- 95 mentary switch device. Figs. 17, 18, and 19 are sections on the lines G Gr, H H, and I I, respectively, of Fig. 16. Fig. '20 is a dia,- gram.

Referring to Figs. 1 toll, inclusive, a is a 100 Figs. 8 and 9 are telephonic transmitter, and a telephonic re- 1 celver located within a cylindrical casing c,

thatis mounted to turn around a horizontal nication with the receiver 7) and its ends betubes g and It.

ing" in communication with external hearing- Inthe example shown the tube (l is flanged at one end at Z? and fixed to a disk m, secured to the upper end of-the side portion c of the holder 0, which is made hollow and of stirrup shape, the other end of the tube extending through theupper end o fthe opposite side portion of the holder. Casing c is mounted at one side to rotate around disk m, a water-tight joint being formed between the two by a packing-ring n, preferably-of circular section and of material such as cotton wick impregnated with tallow. The opposite side of casing is formed with a boss 0, mounted to rotate in the side portion of the holder I and is bored to form a hearing for the corresponding end of the tube a, which extends through it. The casing c has an opening 11, normally closed by a plate I] and through which access'can he obtained to its interior. 'lhelower portion of the holder 1: is provided with a sleeve 1', adapted to fit over and rotate upon the top of pillar antifriction-balls .s being placed between the under side of the holder and the top of the pillar to facilitate turning movement, and also i a ring t, of material such as cotton wick, to prevent the holder and attached parts turning too freely. The sleeve is provided at different heights with set-screws 11, taking into recesses '2', extending nearly around the pillar for the purpose of preventing vertical movement of the holder 1' and attached parts, while allowing of their being turnedthrough nearly a complete circle. The uppcr'end of the main hearing-tube y is fixed to the boss (I of casing 0 for the purpose of turning the same about a horizontal axis. It is also fixed, as by screwing, to a tube '11, that extends along and closely fits a portion of the sound-tube (I, so as to prevent escape of sound-waves between the boss and hearing-tube. In the opposite side a of holder 0 is mounted a ball 1, that has a central passage 2 therethrough in communication with the tube (1, and a shank 3, to which is fixed the upper end of hearingtube It. Both hearing-tubes are ot rigid material, such as metal, and have their lower ends bent toward each other and provided with earpieces i, fitted with hollow rings or pads 4, of india-rubber. A spring 5, Fig. 2, may be used to insure the ret rn of the easing when released to its normal position. The transmitter 11 is preferably a waterproof one of the kind described in the specification i of a former patent granted to me, No. ($55,621). It is mounted in a holder (3, having a mouthpiece 7 and provided with a perforated prol l L l i ll 1 l tecting-plate 8 opposite the transmitter-diaphragm, and is secured to the inner periphcry of easing c opposite a hole 9 therein, which when the casing is in its normal position'with i the hearing-tubes hanging downward, as in Figs.'1 and 2, will be at the bottom of the casing. The receiver Z) is preferably of known kind, comprising a strong permanent magnet 12, Figs. 10 and 11, fixed to a base-piece b and having inwardly-turned ends b, with polar extensions If, that terminate near to the diaphragm b and carry the r eivercoils I)". The base-piece 71 has a tubular extension 10, that is attached to a lateral tubular extension (1' of the sound-tube (Z, Fig. 2. To prevent the magnet 7) affecting external apparatus-for example, a ships compass-it may, as shown, be provided with a cover 6 which, as well as the base-piece b is made of iron, so 'as" to form an ironclad receiver. The switch device comprises'a set of fixed spring-contacts 11, 12, 13,

14, and 15 and terminals 16 and 17, fixed to a bar 19, of insulating material, carried by a support 20, that is secured by a boss 21 to a second tubular extension (Z of the soundtube (.5. 23 and 24 are movable switch-con tacts fixed upon a disk 25, of insulating material, secured to the inner-surface of the righthand end of the rotary casing c. consists o'fa segment of a flat metal ring so arranged, as shown, that when partly rotated by the casingr' from its normal position (shown in Fig.5) to thatshown in Fig. 6 it will be brought into electric connection with contacts 11 and 12. Contact 24 consists of a fiat metal ring formed with a segmental opening 26, bridged by an outer segmental-shaped piece 26, of metal. Contacts 11 and 15 are connected, as showndiagrammatically in Fig. 5, by conductors 27 and 28 to two insulated line-conductors 27 and 28*, contact 12 and terminal 17 are connected to the terminals 29 and 29* of the trans- Contact 23 mitter 11, contact 13 is connected by aconductor 30 to one terminal of a bell 30, the other terminal of which is connected by a conductor 30" to earth or a return-comluctor E, and terminal 14 is connected to one end of the telephonic receiver-coils I)", the other end of which is connected to terminal 16, which is also con nected to earth or the return-conductor E. The positive pole of an electric battery 32 is connected by a conductor 32 to terminal 17' and the negative pole is connected to earth or the return-conductor E. The bell 30 may be inclosed in a casing 31, fixed to the sleeve 0' of the rotary holder (2, Figs. 3 and 9. 33 is a bell-push for ringing up the bell of a telephonic instrument at a distant station. It is carried by the upwardly-extending portion a. of the holder Fig. 3, and is arranged to force a spring-blade contact 34 against a fixed contact 35, the two contacts being respectively connected to conductors 36 and 37, extending through the hollow holder, and of which 36 is connected to the positive pole of the battery 32, and 37 is connected to the line-wire 27.

ormally contacts 1.1, 12,-and 14 bear upon the rotary insulating-disk 25, Fig. 5, while contact 13 bears upon the portion 26 of ring 24, upon which the contact constantly bears.

In this position of the parts the circuit of the bell is closed at the instrument, but is. open called up from the distant station, and the circuits of the transmitter a and receiver 6 are open. Also the circuit between the battery 32 and line-wire 27 is normally open between the contacts 34 and 35. Upon turning the casing c with contacts 23 and 24, say, into the position shown'in Fig. 6 contacts 11 and 12 will bear upon contact 23, so as to completethe circuit of the transmitter a, contact 13 will bear thepurpose of ringing up a similar instrumentat a distant station to which the linewires 27 and 28* are connected. The conductors connected to the several fixed contacts 11, 13. and 15 and terminals16and 17 are led through holes 38 in'one side of the holder 0,

, Fig. 4, and the disk m and flanged end 12 of the sound-tube d, the conductors being led into the adjacent hollow portion' 'e of the holder, where they are connected to a set of vterminals 39, fixed upon an insulating-base -40, secured to the holder, the latter terminals being also connectedto corresponding con ductors extendingdownward through the said holder and the pillar f. The portion e'ot the,

holder has a removable cover-plate.

The Operation of the apparatus is as follows: Normally the various parts of the apparatus areinthe position shown in Figs. 1 to 5,'in-' elusive, in which the transmitter and receiver are out/of circuit and the bell-circuit closed through thdco'ntacts 13, 26, 24, and 15, so

that the hell can be rung by the closing of its circuit at a distant station through the linewire 28?. "-Upon raising the tube g intoa convenient position to be applied to the ear of the operatorbthe casing 0 will-be moved into a position to bri'ng the opening 9 therein into, a convenientplposition for speaking into the. transmitter c6;;and.th e circuits otthe trans mittera and 'fi eceiver twill be simultaneously .6 I closed and that of the bell opened, so aslto' enable the operator to carry on a telephonic conversation with another person at the distant station, the telephonicall3t.- received sounds passing from the receiver into the central portion of the sound-tube d and thence to the hearing-tubes g and it. During this'time'the reason specially paratus at distant stations.

I contacts 69" 69 69.

operator can look overthe topor either side of the instrument ingorder to observe a dis 'tant object and can readily turn the casing c and holder 6 around tli'evertical pillar for hold it while the pillar'fin'oves within the sleeve 1', so as to keep the-"object constantly in view. As will be obvious, the apparatus is for this suitable for use on board a ship. a

In the modified construction shown in Figs. 12, 13,and lathe holder is mounted so thatit can make one or more complete revolutions upon thepillar For this purpose the sleeve 7* carries a plate a; of insulating material, to which are secured concentrically-arranged circular contacts :0 m m m 0 against which respectively bear spring-contacts y g 1/ 3/ 3/ carried by a piate y, ofinsulating material, secured to the pillar f. Theset-screws u in this case take into a single recess o, extending completely aroundthepillar. To the'two sets of contacts are connected the two portions of the conductors 27, 28, 30", 32*, and E, which pass to the switch device within the casing c and to the battery and bell,the lower portions of the conductors passing from the fined contacts through holes .2 in the plate 2 ,T y

In some cases there may be mountedupon a stationary part of the apparatusfor exam? ple', upon the pillar f, as shown in Figs. 1 and .3a supplementary switch device 42, whereby the conductors 27 and 28 of the telephonic apparatus can be connected up at will with linewires extending to two or more telephonic ap- In the example shown in Figs. 1 and 3 and in Fig. 15 the supplementary switch apparatus isadapted, to connect the conductors 27 and 28 to anyone -'of three sets of line conductors 27*.28227" 28", and 27 28, extending to telephonic -apparatus say in the poop, engine-room, and forecastle, respectively, of a ship. For this purpose the conductor 27 is connected to one of three electrically-connected fixed contacts 67 67 and 67 and conductor 28 is connected to one of three electrically-connected fixed The three line-wires 27, 27 and 27 are connected, respectively, to three movable spring-blade contacts 70?, 70", and 7 0?, and the three line-wires 28*,28", and 28 are respectively connected to'tlu'ee movable spring-blade contacts 71, 71. and 71.

The contactsl71; 71", and 71 respectively bear against the contacts 7 O 7 ()"7 O 'through insulating distance-pieces 72. The free ends of contacts .7 0" 70 7 0 terminate, respectively,

in front of' but are normally held away from contacts 67 67" 67. tacts 71 71 71 terminate in front of and normally bear, respectively, against fixed con- The free ends of connormally opposite corresponding apertures 60, 60", and 60 in the front ,cover of the switch-box 42 and opposite a'strip of glass therein that forms the front of a longitudinal chamber 42, into which the light of a lamp 75 can pass at night-time. I Upon the strip of glass and opposite the apertures 60, 60", and

60 are marked the words of the station to which the indicators correspondfor example, Poop, Engine-room, and Forecastle. The other ends of the windings of the indicator are connected to a conductor 61, that is connected to one terminal of the bell 30, the other terminal of which is connected to the return-conductor E, as before.

' 76 is a cam fixed to a spindle 46 and provided with operative partsi76 76 76*,"thht' 59"-}isshown released.

The operation of the supplementary switch is as follows: NVhen the parts are in the positions shown. in Fig. 15, a current can be sent from any one of the distant stations, through the corresponding line-wire 28*, 28, or 28 and the corresponding indicator 58", 58, or 58, to the bell 30 and thence to the returnccnductor E, the corresponding indicatorshutter falling to indicate which station is ringing up. By then rotating the spindle 46 so as to bring the handle 62 into the positionsay 63corresponding to the indicator that has been 'operatedsay, for example, the poop-indicator 58+the cam projection 76 will come into action and move the contact 71 from contact 7 3 and cause it to bear against contact 69 and at the same time cause contact to bear against contact 67, thereby opening the corresponding indicator-circuit, so as to stop the bell and connecting the line-wires 28 and 27 to the conductors 28 and 27, respectively, of the telephonic apparatus. The latter apparatus can after rotating the cylinder 0, Figs. 1, 2, and 3, be then used, as before, for sending and receiving telephonic messages.

63, 63", or 63 corresponding to the station required and the push 33, Fig. 3, operated to send a'current from the battery, through the conductor 27, to the corresponding line-wire of the required station, after which telephonic messages can be sent and received as before.

In the modified construction of supplemen-.

"tary apparatus shown in Figs. 16 to 20, in-

elusive, the conductor 27 is connected,through a terminal 43,to a spring-contact 44, that bears against the under side of a contact-ring 45,;

To ring up either station, the' handle 62 is moved into the operative position that is fixed to but insulated from the spindle 46 and is providedwith a contact-pin 47. The conductor 28 is connected,through a terminal 48 and a metal strip 49, to a metal sleeve 50, that is also fixed tobut insulated from the spindle 46 and is provided with three comactpins 51, 52, and 53. The line conductors 27, 27 and 27 are respectively connected tr three stationary spring-contacts 54, 54", and 54. The line conductors 28, 28", and 28are respectively connected to three spring-coir tacts 55, 55", and 55, which normally bear upon fixed contacts 56, 56", and 56. Thelattcr contacts are respectively connected by conductors 57, 57 and 57 to the windings of three ordinary electric indicators 58", 58, and 58, provided, respectively,-with shutters 59", 59 and 59, arranged opposite correspond ing apertures 60", 60, and 60 in the front cover of the switch-box 42, Fig. 1. The other ends of the three windings of the indicators are connected to the conductor 61, that is connected to one terminal of the bell 30,the other terminal of which is connected, as before, to the return-conductor E. The contactpin 47 is arranged to be brought into contact successively with the fixed contacts 54, 54", and 54 by rotating the spindle 46 by means of the handle 62, Figs. 1 and 3, from thenormal position 63 into the successive positions 63, 63", and 63. Normally the contact-pin 47 bears upon a dummy contact 64, Fig. 16. The contact-pins 51, 52, and 53 are normally out of contact, but are arranged to respectively lift in succession the spring-contacts 55*, 55", and 55 from contacts 56, 56, and 56" when brought into the three respective posit ons mentioned. 66 is a bridge-piece for holding the contact-rings 45 and 50, with insulating material, in place within the switch-box 42. The operation of this switch is similar to that of the switch shown in Fig. 15, except that when the spindle 46 is rotated to bring the handle 62 into the position corresponding to the indicator that has been operated -sav, for example, the poop-indicator 58 the contactpin 47 will be caused to bear upon thespringcontact--say 54--and connect the conductor 27 to the corresponding line conductor 2."? through the contact-ring 45, and the corre sponding contact-pin 51 will bear against and lift the corresponding spring-contact 55 from the fixed contact 56, so as to placethe c0nductor 28 in connection with the corresponding line conductor-say 28--through the sleeve 50 and open the corresponding indicator-circuit and stop the bell 30, which, however, is left free to be rung from either of the other stations.

As will be obvious, the details of construe tion canbe variously modified withoutdc parting from the essential featuresof the 311- vention. i What Iclaim is ele o e fieee ws ampuses.

ing, a sound-tube about which said casing is mounted to turn, a holder carrying said soundtube and mounted to turn about an axis at right angles to that of lthe sound-tube, and a transmitter and receiver-located within said casing.

' 2. llelephonio apparatus comprising a cas- 'ing, a sound-tube about which said casing is mounted to turn, a holder carrying said soundtube and mounted to turn about an axis at right angles to that of the sound-tube, a transmitter and a receiver located within said casing, and a switch device also located within ing-aperture in its periphery.

4. Telephonic apparatus comprising a casing, a horizontal sound-tube about which said casing is mounted to turn, aholder carrying said sound-tube and a pillar upon'which saidholder is mounted, anoiupon which it can turn about a vertical axis, said casing having a speaking-aperture in its periphery and containing a transmitter, a receiver and aswitch device, said switch device controlling the circuits oi'said transmitter and receiver, and the electrical connections for saidswitch, receiver and transmitter extending through said pillar and easing.

5. Telephonic apparatus comprising acas Ling having a speaking-aperture in its periphiy, a Sound-tube about which said casing is t mounted to turn, a transmitter arranged within "said casing to come opposite said aperture, a

receiver located within. said casing and having its diaphragm opposite a passage communicating with said sound-tube, and means for controlling the circuits of said transmitter and receiver by movement of said casing.

6. 'lelephonic apparatuscomprising a cas ing, a sound-tube about which said casing is mounted to turn, a holder carrying said soundtube and mounted to turn about an axis at right angles to that of the sound-tube, a transmitter and a receiver located within said casing, and means for controlling the circuits of said transmitter and receiver and adapted to be operated by movementof said'casing.

7, Teiephonic apparatus comprising a casing, s horizontalsound-tubeabout which said casing is mounted 'to turn,-aholder carrying i said sound-tube and a pillar upon which said holder ismounted, and 'upon'which it can turn about a vert cal axis, said casing inclosmg a transmitter and receiver, and a switch device;

1 controlled by movement or said casing about G 8. Telephonic apparatuscomprisinga casmg, a sound-tube about which said casing is mounterfto turn, a holder carrying said soundtube and mounted to turn about an axis at right angles to'that of'the sound-tube, a transmitter and a receiver arranged within said casing, the transmitter being arranged to come opposite an opening in said casing and said receiver hav ing its'diaphragm opposite a space in communication with said sound-tube. hearing-tubes connected to said sound-tube, and a,

switch device located'within said casingand adapted to control the circuits of said transmitter and receiver, some ofthe switch connections being carried by said casing and some by said sound-tube.

-9. Telephonic apparatus comprising a casing, a horizontal sound-tube about which said casing is mounted to turn, a holder carrying said sound-tube, a support upon which said holder is mounted to turn about a vertical axis, a transmitter located within and having its diaphragm opposite an opening 1n said casing, a-receiver located within said casing and having its diaphragm opposite a passage communicating with the interior of said soundtube, hearing-tubes in communication with said sound-tube and", one of which is fixed to said casing, a bell external to said casing, and a switch device locatdd within said casing and adapted to control the circuits of said transmitter, receiver and bell, some of the switch connections being carnied bysaid casing and others by said soundt'ube so as to be controlled by movement of said casing.

10. Teleplionic apparatus comprisinga cy-.

' lindrical casing, a horizontal sound-tube about which said casing is mounted to turn,a hol-q l'ow holder carrying said sound-tube, a hollow .pillar upon which saidholderis mounted to turn aboutv a vertical axis, a transmitter arranged within said casing so as to be opposite an opening therein, a receiver having its diaphragm opposite a passage communicating with said sound-tube, movable hearing-tubes in connection with said sound-tubes and one of which is fixed to said casing, a bell external to said casing, and a switch device located within said casing and adapte' to control the circuits of said transmitter, r ceiver and hell by movement of said casing, said, holder be ing formed with holes through which the electrical switch connections can be led to and from the casing and switch and through the vertical support and holder.

11. 'lclephonic apparatus comprising a hol low vertical support, ahollow U-shaped holder mounted to turn thereon. about a vertical axis,

a horizontal sound tubec-arried .by said holder,

come opposite said speaking-aperture, a,1,:e

- ceiver arranged within said casing so that its' diaphragm is opposite a passage communicatlhg with said sound-tube, a bell external to said casing, hearing-tubes 1n communication with the ends of said sound-tube and one of 5 which is fixedto said casing, a switch device carried partly by said casing and partly by said sound-tube and adapted to control the 'circuits of said transmitter, receiver and bell,

and a circuit maker'carried by said holder t and whereby the circuit of a bell at a distant station can be closed.

12. Telephonic apparatus comprising a hol- -low stationary support, a hollow U-shaped holder mounted to turn thereon about a verti 5 cal axis, a sound-tube carried by said holder,

a casing mounted to turn about said soundtube and formed with a speaking-aperture in its periphery, a water-tight transmitter fixed to the inner side of said casing so that its diaphragih is opposite said speaking-aperture, a

receiver located within said casing and car- .ried by said sound-tube and having its diaphragm opposite a passage communicating with said tube, hearing-tubes in communica- 15 tion with the ends of said sound-tube and one of which is fixed to said casing, a bell external to said casing, a switch the stationary portions of which are carried by said sound-tube and the rotary portions of which are carried 3, by said casing and which is adapted to control the circuits of said transmitter, receiver and bell as herein set forth, said casing and bolder being formed with holes through which the conductors connected to said switch can be led from the casing to the holder and thence 49 closed.

13. Telephonic apparatus comprising a casing formed with a speaking-aperture in its periphery, means for supporting said casing so that it can turn about axes at right angles to one another, a waterproof transmitter located within said casing with its diaphragm opposite said speaking-aperture, a sound-tube extending through said casing, an iron-clad receiver mounted in the said casing with its mounted to turn, a spring arranged between said casing and sound-tube so as to be stressed when the casing is turned to bring the aperture therein into position for use, a holder for said sound-tube, a support upon which said holder, can turn about a vertical axis, hearingadapted to thereby control the circuits of said transmitter and receiver.

16.. In telephonic apparatus, a horizontal sound-tube, means for carrying the same so that it can rotate about a vertical axis, a casing mounted to turn about said tube, a watertight transmitter located within said casing opposite an aperture therein, a receiver carried by said sound-tube, and a switch for controlling the circuitsiof said transmitter and receiver, said switch comprising a number 'of insulated connections, a holder secured to said sound-tube and to which said connections are fixed, and insulated circular contacts fixed to the inner surface of oneside of said casing and against which some of the stationary connections are arranged to bear by rotation of said casing.

17. 'Telephonic apparatus comprising a hollow pillar, a U-shaped hollow holder mounted to turn thereon about a vertical axis, a horizontal sound-tube fixed tosaid holder, a casing mounted 'to rotate about the axis of said soundtube and having a speaking-aperture in its periphery, a waterproof'transmitter carried by 'said casing and having its diaphragm oppo'si'tc said speaking-aperture, a receiver carried by said sound-tube and having its diaphragm opposite a passage leading tovsaid sound-tube, a bell external to said casing, two hearing-tubes arranged in communication with the opposite ends of said sound-tube and one of which is fixed to said casing, a switch device having its 55 ing having a speaking-aperture in its periph-.

5c diaphragm opposite a passage in communica- 1 tion with said sound-tube, and means for controlling the circuits of said transmitter and receiver.

14. 'lelephonicapparatus comprising acasstationary connections carried by said soundtube and its movable connections carried by 'said'casing, the aperture insaid casing and 'the switclvc'ontacts being so arranged that whenithe hearing-tube fixed to the casing hangs downward, the aperture will be at the cry and containing a transmitter, a receiver and a switch device adapted to control tlgeci-ra cuitiof said transmitter and receiver, a sound tube about which said casing is mounted to 6 turn, a U-shaped holder carrying said sound-' tube, andia support upon which said holder is mounted to turn about a vertical axis;

15. li e'lephonic apparatus comprising a casing having a speaking-aperture in its periph- 6 5 ery,a sound-tube about whichsaid casing is bottom of'the casing, the circuit of the bell will be closed, and the circuits of the transmitter and receiver will be opened and when the casing is rotated by the said hearing-tube to bringthe speaking-aperture into position for use, the bell will be out of circuitand the transmitter and receiver in circuit.

"' 18. Telephonic apparatus comprising a cas- -ing having a speaking-aperture at its periphery 'asound-tulmabout the axis'of .whichsaid.

casing can rotate, a hollow holder carrying said sound-tube and mounted to rotate about a vertical axis, a transmitter, receiver and switch device located within said. casing, and acircuit-niaking device carried by said holder and serving to close the bell-circuit of atele- I phonic apparatus at adistant station, said. casingand holder being adapted to admit of the passage therethrough of the elcctricalconnections for said switch, and the holder for the passage therethrough of the electrical connections of said circuitanaking device.

19. 'lelephonic apparatus comprising a cas ing having a speaking-aperture in its periphcry and containing a transmitter and a row ceiver, a sound-tube about which said casing is mounted to turn, a holder carrying said sound-tube, a support upon which said holder is mounted to turn-about a vertical axis, a set of insulated rotary contacts carried by said holder and to which the telephonic connections are made, and a set of fixed contacts carried by said support, arranged to bear against the respective rotary contacts and to which corresponding electrical connections are made.

20. Telephonic apparatus comprising a casing having a speaking-aperture in its periphery and containing a transmitter and a receiver, a sound-tube about which said casing is mounted to turn, a holder carrying said sound-tube, a support upon which said holder is mounted, to turn aboht a vertical axis, a switch device located in said casing and adapted to control the circuits of said transmitter and receiver, insulated rotary contacts carried by said holder and connectedto the switch connections, and insulated fixed contacts carried by said support, bearing against the re: spective rotary contacts, and to which condoctors forming continuations of the switch connections are attached.

.21. in telephonic apparatus the combination with anmvable casing containing a trans mitterand a receiver, and having a speakingaperture in its'periphery, a sound-tube about the axis of which said casing can. rotate, a

--ceiver being connected at will to anyone of the pairs of line-wires;

22. In telephonic apparatus, thecombina tion with a casing mounted to turn about a horizontal axis and also about a vertical axis, a transmitter and areceiver located within said casing, a, main switch device adapted to control the circuits of said trahsmitter and receiver, electrical connections substantially i described connected to said switch and comi prising a main conductor for the transmitter,

a' main conductor for the receiver, and a return -.conductor, a bell having one terminal connected to said return -conductor, and an electric generator having one pole connected to one of said main conductors and'the other pole to said return-conductor, of a number of pairs of linewires, and a supplementary switch device comprising a set of insulated contacts each .of which is connected to one of the line-wires of a pair of line-wires, a second set of insulated contacts each of which is connected to the remaining line-wire of a pair of line-wires, a third set of insulated contacts upon which the several contacts of the second set normally bear, separate electric indicators each having one end of its winding connected to one of the contacts in the third set of contacts and its other end in connection with the second terminal of the bell, and a rotary body adapted by iotati'on to move one or other of the contacts of the second set of contacts from the corresponding contact of the third set of contacts and place it in connection with one of the main conductors and to place the corresponding contact in the first set of contacts in connection with the other main conductor.

23. in telephonic apparatus, thc combination with a transmitter and a receiver, a bell, an electric generator, a switch for controlling said transmitter, receiver and hell, and the electrical connections for said switch and generator comprising two main conductors one forthe transmitter and the other for the re-, ceiver, of a number of pairs of line-wires extending to telephonic apparatus at distant stations, and a supplementary switch device comprising a set of fixed contacts to which the main conductor of the transmitter is connected, a second set of fixed contacts to which the main conductor of the receiver is connected, a number of pairs of insulated springcontacts connected to the pairs of line-wires, a third set of fixed contacts against each of which one of the spring-contacts of'cach pair of contacts normally-bears, a set or" electrical indicators each having its Winding connected atone end to one of the contacts of the third set and its other end to the bell-, and a mov able device whereby one ofthe contacts of either pair of spring-contacts can be moved from the corresponding contact in the third set of contacts and caused to bear against the corresponding contact in the second set of contacts and also to cause the second springcontact' of the pair to bear against the corresponding fixed contact in the first set of con- 

